backlight: ktd2801: Depend on GPIOLIB

The LEDS_EXPRESSWIRE library used by the driver requires GPIOLIB. Make
sure this dependency is not left unsatisfied.

Reported-by: Randy Dunlap <rdunlap@infradead.org>
Closes: https://lore.kernel.org/all/b6c481bb-e854-405e-a428-90301789fe20@infradead.org/
Signed-off-by: Duje Mihanović <duje@dujemihanovic.xyz>
Reviewed-by: Daniel Thompson (RISCstar) <danielt@kernel.org>
Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Link: https://patch.msgid.link/20250729-expresswire-dep-fix-v1-2-635cd4cc746b@dujemihanovic.xyz
Signed-off-by: Lee Jones <lee@kernel.org>

Author: LegoLivesMatter

drivers/video/backlight/Kconfig

@@ -185,6 +185,7 @@ config BACKLIGHT_KTD253
 
 config BACKLIGHT_KTD2801
 	tristate "Backlight Driver for Kinetic KTD2801"
+	depends on GPIOLIB || COMPILE_TEST
 	select LEDS_EXPRESSWIRE
 	help
 	  Say Y to enable the backlight driver for the Kinetic KTD2801 1-wire